Redispersible polymer powders by redistribution of polyvinyl alc

Details Redispersible polymer powders by redistribution of polyvinyl alc Redispersible polymer powders by redistribution of polyvinyl alc

1994-05-02

1995-12-05

Clark, W. Robinson

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 56, 428503, C08L 2902, C08L 2904

Patent

active

054730139

ABSTRACT:
A process for making a spray dried redispersible polymer powder, especially a VAE copolymer powder, by spray drying a polymer emulsion containing a polyvinyl alcohol redispersant. A sufficient amount of the total polyvinyl alcohol redispersant is added to the polymer emulsion prior to spray drying and the remaining amount of polyvinyl alcohol redispersant is added as a dry powder to the spray dried polymer powder.

REFERENCES:
patent: Re28780 (1976-04-01), Bergmeister et al.
patent: 5131953 (1992-07-01), Kasica et al.
patent: 5252704 (1993-10-01), Bright et al.

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